CVE-2026-118238 — HIGH (7.2)

Vulnerability Description

The Tenda W18E web management server is vulnerable to OS command injection via the "diagnose" packet-capture feature due to improper validation of JSON fields. An authenticated user can inject shell metacharacters into the protocol or targetDevice fields, which are later concatenated into a tcpdump command and executed with root privileges. This vulnerability can be exploited without authentication if the device is in a factory-reset state.

CVSS Score

7.2

HIGH

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Related Weaknesses (CWE)

CWE-78

References

https://cushz.github.io/en/exploit-development/2026/10/27/hacking-routers-for-fu

FAQ

What is CVE-2026-118238?

CVE-2026-118238 is a vulnerability with a CVSS score of 7.2 (HIGH). The Tenda W18E web management server is vulnerable to OS command injection via the "diagnose" packet-capture feature due to improper validation of JSON fields. An authenticated user can inject shell m...

How severe is CVE-2026-118238?

CVE-2026-118238 has been rated HIGH with a CVSS base score of 7.2/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-118238?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.